cloned cows and biotech beef: does animal biotechnology ... · animal biotechnology and genomics...
TRANSCRIPT
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Animal Genomics and Biotechnology Education
Cloned Cows and Biotech Beef:
Does Animal Biotechnology
have a Future? Alison Van Eenennaam, Ph.D. Cooperative Extension Specialist
Animal Biotechnology and Genomics University of California, Davis
(530) 752-7942
animalscience.ucdavis.edu/animalbiotech
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Animal Biotechnology and Genomics Education
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Animal Biotechnology and Genomics Education
QUESTION: Is this a picture of
a guinea pig?
Yes N
o
5%
95%
1. Yes
2. No
HINTS
• Just look at the
numbers on the
remote
• Green light means
you are being read
• Only last recorded
vote counts
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Animal Biotechnology and Genomics Education
Do you oppose the genetic
modification of animals?
Yes N
o
72%
28%
1. Yes
2. No
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Animal Biotechnology and Genomics Education
56% of Americans oppose scientific research
into the genetic modification of animals http://pewagbiotech.org/research/2005update/2005summary.pdf
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Animal Biotechnology and Genomics Education
Unnatural genetic modification
of animals….. like biotech beef
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Animal Biotechnology and Genomics Education
What is Biotechnology ?
Biotechnology Technology based on
biology. The application of
science and engineering to
living organisms.
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Animal Biotechnology and Genomics Education
What isn’t biotech beef?
• Selective breeding programs
• Artificial insemination
• Embryo transfer
• Genome-enabled or genomic selection
• Genetic engineering
• Cloning
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Animal Biotechnology and Genomics Education
Fav
orable
Unfa
vora
ble
7%
93%
Genomic Selection (50,000 DNA
marker-assisted selection !!)
1. Favorable
2. Unfavorable
Would you say your overall impression of genomic selection is…..
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Animal Biotechnology and Genomics Education
Fav
orable
Unfa
vora
ble
34%
66%
Genetic engineering allows for
traits to be moved precisely from
one organism/animal to another
1. Favorable
2. Unfavorable
Would you say your overall impression of genetic engineering is…..
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Animal Biotechnology and Genomics Education
Fav
orable
Unfa
vora
ble
46%
54%
Cloning retains desirable genetics
by producing an animal that is a
genetically-identical copy.
1. Favorable
2. Unfavorable
Would you say your overall impression of cloning is…..
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Animal Biotechnology and Genomics Education
Public Attitudes Towards Specific
“Animal Biotechnologies” (IFIC, 2005)
http://ific.org/research/upload/2005BiotechSurvey.pdf
53
39
15
0
10
20
30
40
50
60
70
80
GENOMIC
SELECTION
GENETIC
ENGINEERING
CLONING
%FAVORABLE
UNFAVORABLE
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Animal Biotechnology and Genomics Education
Have you ever eaten a
clone?
Yes N
o
48%
52%
1. Yes
2. No
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Animal Biotechnology and Genomics Education
What is a clone ?
• Cloning, in horticulture and biology, any
organism whose genetic information is
identical to that of a "mother organism"
from which it was created.
• Food from clones has been a part of our
diet for years. Many common fruits (e.g.,
pears, apples, oranges and lemons) and
several vegetables (e.g., potatoes and
truffles) are clones.
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Animal Biotechnology and Genomics Education
The public opposes the cloning of animals
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Animal Biotechnology and Genomics Education
Have you ever eaten milk or
meat from a cloned animal?
Yes N
o
48%
52%
1. Yes
2. No
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Animal Biotechnology and Genomics Education
Mechanical embryo splitting
The Holstein association of America has registered 2319 embryo split clones (ETS) through October 2002 – probably
the most widely recognized were DUPLICATE and DIVIDE.
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Animal Biotechnology and Genomics Education
Cloning by embryo splitting
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Animal Biotechnology and Genomics Education
Have I ever eaten products
from a cloned animal? YES!!
Therefore most of us have probably
ingested meat and dairy products from
livestock cloned by natural reproduction
(monozygotic siblings), mechanical
embryo-splitting, or even nuclear transfer
from an embryonic donor cell into an
enucleated oocyte.
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Animal Biotechnology and Genomics Education
Nuclear transfer from an adult donor
cell into an enucleated oocyte.
Dolly (1996)
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B A
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Adult
(Somatic)
Cell
Unfertilized
Egg
(Oocyte)
Cloned
Embryo
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Five Months Later
Clone Lamb of Ewe “A”
B A
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Animal Biotechnology and Genomics Education
Dolly rapidly became entangled with the debate over human cloning
Ensuing discussion failed to elaborate on the reasons as to why cloning was developed
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Animal Biotechnology and Genomics Education
Regancrest Emory Derry died unexpectedly.
Who’s Buying?
$20,000
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Animal Genomics and Biotechnology Education
On January 15th, 2008 the FDA published its final 968-page risk assessment on animal cloning. This report, which summarizes all available data on clones and their progeny are as safe to eat as food from conventionally bred animals
Are the milk and meat from SCNT clones safe for human
consumption?
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Animal Biotechnology and Genomics Education
U.S. has a science-based
regulatory system
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Animal Biotechnology and Genomics Education
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Animal Biotechnology and Genomics Education
Of the Americans who are uncomfortable
or unsure about animal cloning; their
primary concern is:
5%
6%
6%
10%
13%
23%
36%
1%Other
Distrust producers of clones
No opinion
Fear of risks
The effect on animal species
Personally uncomfortable with it
Safety
Religious or ethical
http://pewagbiotech.org/research/2005update/2005summary.pdf
10/2005
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Animal Biotechnology and Genomics Education
18%
53% 10%
9%
10%Not Sure
2. Science only
1. Morals / Ethics
and Science
1. Government regulators should include ethical and moral
considerations, in addition to scientific evaluation of risks and
benefits, when making regulatory decisions about cloning or
genetically modifying animals.
2. Though ethical and moral considerations are important,
government regulators should consider only scientific
evaluation of risks and benefits when making regulatory
decisions about cloning and genetically modifying animals.
27%
63%
Feel that way strongly 10%
http://pewagbiotech.org/research/2005update/2005summary.pdf
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Animal Biotechnology and Genomics Education
Animal cloning regulations in Denmark and Norway
prohibit cloning for food and agricultural purposes.
January 2007: The European Food Standards Agency is seeking urgent legal advice after farmers announced the birth of a calf whose genetic mother is the clone of an American prizewinning dairy cow.
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Animal Genomics and Biotechnology Education
Which clones will be labeled?
• Legislative bills calling for the mandatory labeling of products derived from clones and their offspring have been introduced
• Is the intent of such labels food safety or ethical misgivings?
• If it is ethical, then unclear why all clones are not subject to these labeling requirements?
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Animal Biotechnology and Genomics Education
CASE STUDY
Should we genetically engineer animals improved health and welfare? If we can genetically enhance disease resistance – are we obligated to do so – and if not why not?
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Animal Biotechnology and Genomics Education
Transgenic cows expressing an antibacterial
endopeptidase in their mammary glands
show enhanced resistance to mastitis.
Wall,R.J. et al. 2005. Genetically enhanced cows resist intramammary Staphylococcus aureus infection. Nature Biotechnology 23, 445-451.
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Animal Genomics and Biotechnology Education
Dog evolved from a common wolf like ancestor. Breeds have been developed for work and “companionship”
Is this more “natural” or more acceptable than genetic engineering?
CASE STUDY
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Animal Biotechnology and Genomics Education
Is animal biotechnology risky?
Excessive caution does not necessarily
remove the risk of future catastrophes. It is
possible that “playing it safe” by
abandoning research and development in
all forms of animal biotechnology might
deny us a technique or products which
could prevent an environmental disaster in
fifty years time, or could prove invaluable
in the treatment of some disease.
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Animal Biotechnology and Genomics Education
Would there be general acceptance of transgenic technology if it
could be applied to engineering resistance to influenza in poultry
and therefore lessen the risk of an influenza epidemic, such as
the one in 1918 that killed more than 20 million people?
Clark,J. & Whitelaw,B. 2003. A future for transgenic livestock.
Nat. Rev. Genet. 4, 825-833
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Animal Genomics and Biotechnology Education
http://www.hematech.com
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Animal Genomics and Biotechnology Education
Plasmapheresis to extract polyclonal antibodies
from the blood of cloned, transchromosomic,
knockout cattle carrying human immunoglobulin
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Animal Biotechnology and Genomics Education
• American consumers (75%) and scientists (70%)
agree that cloning and genetic engineering of animals
raise some moral and ethical issues
• However public is much less likely to approve (21-
25%) of these technologies than scientists (60-68%)
Keystone Research Center (2004) – Biotechnology and ethics: a national survey of consumers and scientists. Report to the Biotechnology Industry Organization. KRC Research, Washington DC, 29pp.
“Biotechnology must be used within ethical
constraints. It is the task of bioethics to help
society develop those constraints ”
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Animal Biotechnology and Genomics Education
“Biotechnology must be used within ethical
constraints. It is the task of bioethics to help
society develop those constraints ”
• American consumers (75%) and scientists (70%)
agree that cloning and genetic engineering of animals
raise some moral and ethical issues
• However public is much less likely to approve (21-
25%) of these technologies than scientists (60-68%)
• Animal scientists must become conversant and willing
participants in the consideration of ethical issues and
concerns surrounding the implementation of their work if
they wish to be involved in reaching the societal
consensus as to which ethical constraints will
ultimately be applied in determining acceptable uses
of animal biotechnology
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Animal Biotechnology and Genomics Education
CASE STUDY: MASTITIS
inflammation of the mammary gland
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Animal Biotechnology and Genomics Education
1. Conventional: Antibiotic therapy
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Animal Biotechnology and Genomics Education
2. Natural: alternative therapy
“An infected cow should be given an extra tablespoon of dolomite night and morning until the infection clears. Hydrogen peroxide; 10 ml squirted straight into the affected quarter has cured black mastitis in hours.”
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Animal Biotechnology and Genomics Education
The use of 50,000 SNP markers across the entire genome enables an estimation of genetic merit
3. Genomic Selection (DNA-informed
selective breeding on a grand scale)
Can be used to predict genetic merit for mastitis resistance
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Animal Biotechnology and Genomics Education
4. Genetic Engineering: Transgenic
cows show resistance to mastitis.
Wall,R.J. et al. Genetically enhanced cows resist intramammary Staphylococcus aureus infection. Nature Biotechnology 23, 445-451 (2005).
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Animal Biotechnology and Genomics Education
5. Clone a bull whose daughters are
very mastitis resistant and use these
bulls to breed for mastitis resistance.
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Animal Biotechnology and Genomics Education
Which Animal Biotechnology
would you use?
Conve
ntiona
l Tre
atm
ent
Nat
ural T
hera
py
Gen
omic
Sel
ectio
n
Gen
etic
Engin
eerin
g
Clo
ne a
Res
ista
nt Bull
6%
10%
22%
28%
35%
1. Conventional Treatment
2. Natural Therapy
3. Genomic Selection
4. Genetic Engineering
5. Clone a Resistant Bull
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Animal Biotechnology and Genomics Education
“We have recently advanced our knowledge of genetics to the point where we can manipulate life in a way never intended by nature. We must proceed with the utmost caution in the application of this new found knowledge.”
LUTHER BURBANK, 1906 Creator of over 800 new plant varieties through plant breeding.